Make SVGTextPositioningElement::elementFromRenderer take a reference

Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h

Index: Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h
diff --git a/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h b/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h
index 6d2e8dc9e046846e722ce48938ab10fd9daf1683..74a55623501ccdb57925bfc19e686ce3192616c0 100644
--- a/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h
+++ b/Source/core/rendering/svg/SVGTextLayoutAttributesBuilder.h
@@ -25,7 +25,7 @@
 
 namespace blink {
 
-class RenderObject;
+class RenderBoxModelObject;
 class RenderSVGInlineText;
 class RenderSVGText;
 class SVGTextPositioningElement;
@@ -42,7 +42,7 @@ class SVGTextLayoutAttributesBuilder {
     WTF_MAKE_NONCOPYABLE(SVGTextLayoutAttributesBuilder);
 public:
     SVGTextLayoutAttributesBuilder();
-    bool buildLayoutAttributesForForSubtree(RenderSVGText*);
+    bool buildLayoutAttributesForForSubtree(RenderSVGText&);
     void buildLayoutAttributesForTextRenderer(RenderSVGInlineText*);
 
     void rebuildMetricsForTextRenderer(RenderSVGInlineText*);
@@ -65,8 +65,8 @@ private:
         unsigned length;
     };
 
-    void buildCharacterDataMap(RenderSVGText*);
-    void collectTextPositioningElements(RenderObject*, UChar& lastCharacter);
+    void buildCharacterDataMap(RenderSVGText&);
+    void collectTextPositioningElements(RenderBoxModelObject&, UChar& lastCharacter);
     void fillCharacterDataMap(const TextPosition&);
 
 private: